Can't disable my lock screen!

My brother plugged my phone into his Vizio tv and it prompted him to set up a password on my Motorola Bionic.
Now I can't turn it off. When I go into my lock screen settings the option to disable the lock is faded and unclickable. I can change the password and change the amount of time the screen is off before the lock needs to be re-entered, but I can't disable it.
Does anyone know how to fix this?